[eitally]

That would be fantastic. I'm almost salivating thinking about how appealing that would be in Manhattan (or DC, or even SF).

[colatkinson]

God yeah it's like a hypothetical version of the AirTrain that isn't a huge pain. Last time I flew out of JFK from Manhattan IIRC the easiest way was to do the E or LIRR from Penn to the AirTrain anyway, so might as well streamline the whole shebang.